古いSQLをSQLIに切り替えようとしたときに、これが機能しない理由を教えてください。
$query = "SELECT * FROM `product_category`";
$result = mysql_query($query, $connect) or die("could not perform query: " . mysql_error());
$num_rows = mysql_num_rows($result);
for ($i=0; $i < $num_rows; $i++)
{
$ID = mysql_result($result,$i,"ID");
$name = mysql_result($result,$i,"name");
$description = mysql_result($result,$i,"description");
に:
$query = ("SELECT * FROM `product_category`");
$result = mysqli_query($connect, $query) or die("could not perform query");
$num_rows = mysqli_num_rows($result);
for ($i=0; $i < $num_rows; $i++)
{
$ID = mysqli_result($result, "ID");
$name = mysqli_result($result,$i,"name");
$description = mysqli_result($result,$i,"description");`
「致命的なエラー:未定義関数mysqli_result()への呼び出し」というエラーが表示され続けます